Post-Phase 2 Modifications to Observing Programme

In principle, once the Phase 2 data entry for successful Supplemental Call proposals has been completed, all programmes can be executed as entered. However, the need for further tuning-up of programmes cannot be excluded. It is, however, expected that there will be much less need for such tuning following the Supplemental Call than was necessary following the end of the in-orbit performance verification phase.

• From the Observer's point of view, changes may become necessary based on new information e.g. results from some of the observations in the programme or from other facilities. For these observer-initiated changes, an e-mail explaining the changes should be sent to HELPDESK. If necessary, OTAC will be consulted. Thereafter, any agreed changes will be implemented either by SOC staff or by the Observer remotely logging in or (exceptionally) by a visit to a data entry centre.

• From the side of the SOC, changes may also become necessary based on new information, e.g. a change in the in-orbit performance or in the understanding of the system. If necessary, OTAC will recommend any necessary changes to the programme by adjusting the priorities given to proposals and/or observations. The Principal Investigators of affected observations will be notified directly about the necessity for these changes. In case observing parameters have to be changed substantially, Observers will be contacted by staff of the Science Operations Team.